oe stockholm



WILHELM. HRSTRM, OF STOCKHOLM. SWEDEN, ASSIGNOR T0 AKTIEBOLAGET LAU- RIN`En PERKEL, OF STOCKHOLM, SWEDEN, A FIRM.

rERMurATIoN-PADLOCK.

Specification of Letters Patent. Patelitd Api'. 19, 1921.

Application led September 23, 1920. Serial No. 412.346.

To all 'wlw-mt may concern.: n

Be it known that T, VILHELM OHns'rnM, a subject of the King of Sweden,and a resident of Stockholm, Sweden, have invented certain new anduseful Improvements in Permutation-Padlocks, of which the following is aspecication.

This invention relates to improvements in permutation padlocks in whichthe shackle is held by a spring-actuated bolt, which is brought into andout of engagement with the shackle by locking disks of special shapeconnected with tumblers partly projecting from the lock-plateandprovided with iigures or other signs on their circumference.

Tn the accompanying drawings I have illustrated one way of carrying outthe infvention, in which:

Figure 1 is a vertical section through the lock embodying the presentinvention;

F ig. 2 is a side elevation of the same;

Fig. 3 is a top plan View;

Fig. 4 is a front elevation of one of the tumblers;

Fig. 5 is a side elevation of the same;

Fig. 6 is a top plan view of Fig. 4;

gig. 7 is a plan view of the locking bolt; an

Fig. 8 is a side elevation of the same.

Referring now more particularly to the drawings, wherein like andcorresponding parts are designated by similar reference numeralsthroughout the several figures, I have illustrated the lock whichconsists of a casing having supported therein a vertical central shaft2. Loosely mounted and arranged ink superimposed relation is a pluralityof tumblers or disks 1. These tumblers are flexibly supported upon theshaft 2 by means of coil springs 2', as is illustrated in Fig. 1.Slidably supported within the lock casing is a shackle' 7 havingsubstantially a U-shaped configuration and one arm 7 of this shackle isgreater in length than the arm 7" thereof, but both arms are adapted toproject within the lock casing when the shackle is in locked position.These tumblers 1 each have formed` with one face thereof a segmentallocking disk 3 which is cut away as at 4. A slidable locking bolt 5 isalso arranged within the lock casing having formed with one end thereofan upwardly projecting portion terminating in a hook 6, which hook isadapted to engage a slot formed within the arm 7 of the shackle, whereasthe opposite end of this bolt 5 is adapted to engage a recess formedwithin the arm 7 of the shackle whereby thelatter will be retained inlocked position. This bolt 5 is provided with an elongated slot orrecess 5 for the reception of the bolt 2 and this bolt 5 is arrangedbetween lthe tumblers so as to divide the tumblers in pairs, as isbetter illustrated in Fig. 1. These tumblers are so arranged upon theshaft 2 that the disks 3 will lie closely adjacent, and adapted toV rideupon the peripheres of these locking disks S'are the outer ends of thearms 9, which latter are carried by the bolt 5. A spring S engages thebolt 5 for Vnormally holdinothe arms 9 against the circumference orf thelocking disks 3 and normally tends to hold this bolt 5 out of engagementwith the arms 7 and 7 of the shackle 7.

Then all the locking disks or any of them assumes such a position thatany of the arms 9 rests against the rounded portion of the circumferenceof the disk or disks, the hook 6 is held in engagement with the slot inthe shackle 7. After'the tumblers l have been turned into such positionsthat all of the arms 9 rest against the rectilinear portions 4 of thedisks, the bolt 5 has been forced by the spring 8 out of engagement withthe shackle, which is consequently released, so that it may be drawn outof the lock. When the lock is again to be locked, the shackle is pushedinto the lock and one or more of the tumblers 1 are turned, so that thearms 9 are-pressed back by the rounded portions of the disks 3, wherebythe hook 6 is again brought into engagement with the slot in theshackle.

This arrangement of the lock allows of a great many combinations of themutual positions of the locking disks, only one of these combinationsreleasing the bolt and shackle.

Only two pairs of tumblers and two arms 9 are shown in the drawing.Nothing prevents, however, the arrangement of morev pairs of tumblerswith their appertaining disks 3 and of a corresponding number of arms 9.

Having now particularly described the nature of this invention and inwhat manner the sameis to be performed, what I claim as new' and desireto secure by Letters Patent is l. A permutation lock comprising acasing, a U-shaped shackle having its opposite ends projecting withinsaid casing, a central shaft, a plurality of tumblers arranged in pairsand flexibly supported upon said shaft, a segmental disk formed with oneface of each tumbler, a locking bolt arranged between cach pair oftumblers, arms projecting from said locking bolt and adapted to restagainst the peripheries of said segmental disks, aspring for holdingsaid locking bolt in one position, and saiddisks adapted to `hold saidlocking bolt into engagement with the opposite ends ofsaid shackle,substantially as and for the purpose specified.

2. A permutation lock comprising a casing, a shackle adapted to belocked within saidcasing, a shaft supported within said casing, aplurality of tumblers mounted upon said shaft and arranged in pairs, alocking bolt arranged between each pair of tumblers, a hook `carried bysaid locking bolt, said tumblers being adapted to hold said hook inlocking engagement with said shackle, and means for normally holdingsaid hook out ,of locking engagement with said shackle when said*tumblers are released.

3. A permutation lockrcomprising a casing, a central shaft arrangedtherein, a plurality of horizontally arranged tumblers .within saidcasing and said locking bolt being adapted to be held in lockingengagement with said shackle by means ofV said disks substantially asand for the purpose specified.

4f. A permutation lock comprising a casing, a shackle having itsopposite ends projecting within said casing, a vertical central shaftarranged within said casing, a plurality of circular tumblers looselymounted upon said shaft and partly projecting from one face of saidcasing, a segmental disk formed with one face of each tumbler, saidtumblers being arranged in pairs whereby the segmental disks of eachpair will face one another, a locking bolt arranged between each pair oftumblers and adapted to engage the outer peripheral faces ofsaidsegmental disks, means for normally holding said locking bolt outo1" engagement with said shackle, and said tumblers being adapted to beturned whereby the segmental disks carried thereby may retain thelocking bolt into locking engagement with said shackle.

ln witness whereof I have hereunto set my hand.

VILHELM HRSTRM.

